From the notes:
> The link between the name and the actual dance, the pattern that is described on the floor when the first 12 bars are danced, is the shape of the old-fashioned wood-and-reed (or some other flexible woody material) rug beaters, with its long handle and lobed head. The rest is the swaying of the rug on the line, the beating of the rug, and the ensuing swirling dust